Cover for data relay device



FIG. 1 is a perspective view of a cover for data relay device, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is another side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line shows portions of a cover for data relay device which form no part of the claimed design. 

CLAIM The ornamental design for a cover for data relay device, as shown and described. 